@@ -27,10 +27,11 @@
 @interface OFReadOrWriteFailedException: OFException
 {
 	id _object;
 	size_t _requestedLength;
 	int _errNo;
+	OF_RESERVE_IVARS(OFReadOrWriteFailedException, 4)
 }
 
 /**
  * @brief The stream which caused the read or write failed exception.
  */